This guide provides illustrated descriptions of 46 common and important varieties of igneous, sedimentary, and metamorphic rock found in the San Francisco Bay region. Rock types are described in context of their...

This page serves as an entrance to the short virtual field trips developed for the FILTER project, which "seeks to educate the tertiary education community in the use of digital images and related metadata for learning...

This site features Flash animations that illustrate various facets of the rock cycle. The visualizations depict rock-forming processes, such as erosion, transportation, deposition, cementation, crystallization,...

This astrobiology news article analyzes the role salt played in the evolution of life on Earth. It explains why scientists have long assumed that life originated in the sea and describes the history of water on Earth...